noun
Abbreviation of お姉さん, used as a familiar or affectionate term for one's own elder sister or a young woman. Casual and somewhat childish.
See also: お姉さん
お姉、ちょっと手伝ってくれる？
Hey sis, can you help me a bit?
うちのお姉は大学生なんだ。
My big sister is a college student.
noun
effeminate man; camp gay man
Slang term for a man with effeminate mannerisms or speech, often associated with gay culture or cross-dressing. Usually written in katakana as オネエ. Can be self-referential or used by others, but may carry stereotypical or derogatory nuances depending on context.
See also: おかま
あのオネエのトークは本当に面白いよね。
That effeminate guy's talk is really funny, isn't it?
He speaks in an effeminate manner.
Sense 1 is a shortening of お姉さん (elder sister). Sense 2 is a slang extension, likely derived from the association of effeminate speech with the word お姉 (sister) or the feminine connotations of お姉言葉.